1 /*

     2  * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright (c) 2014, Red Hat Inc. All rights reserved.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    25 

    26 #ifndef OS_CPU_LINUX_AARCH64_VM_OS_LINUX_AARCH64_INLINE_HPP

    27 #define OS_CPU_LINUX_AARCH64_VM_OS_LINUX_AARCH64_INLINE_HPP

    28 

    29 #include "runtime/os.hpp"

    30 

    31 // See http://www.technovelty.org/code/c/reading-rdtsc.htl for details

    32 inline jlong os::rdtsc() {

    33   uint64_t res;

    34   uint32_t ts1, ts2;

    35   __asm__ __volatile__ ("rdtsc" : "=a" (ts1), "=d" (ts2));

    36   res = ((uint64_t)ts1 | (uint64_t)ts2 << 32);

    37   return (jlong)res;

    38 }

    39 

    40 #endif // OS_CPU_LINUX_AARCH64_VM_OS_LINUX_AARCH64_INLINE_HPP